VTY authentication is telnet AUTHENTICATION. telnet AUTHENTICATION can also be divided into: 1. Password Authentication 2. User Name + Password Authentication
Topology:
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Set VM1 Nic IP address to 192.168.2.2
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1. Password Authentication:
Enable password ccna configuration to enter privileged mode the password is ccna and password authentication to enter mode to level 1)
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Password When the cisco password is ciscotelnet)
Login logon Verification
Effect
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2. User Name + Password Authentication:
Username cisco password cisco creates a user name and password
Enable password ccna creates a password in privileged mode. By default, the user name of cisco has the permission of level 1)
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Login local login verification calls the local user name and password
Effect
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Finished
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